Printer ribbon cassette



FIG. 1 is a front, left, top perspective view of a printer ribbon cassette;

FIG. 2 is a rear, top, right perspective view thereof;

FIG. 3 is a top side view thereof;

FIG. 4 is a rear side view thereof;

FIG. 5 is a bottom side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof. 

The ornamental design for a printer ribbon cassette, as shown and described. 